TekRADIUS LT is a RADIUS server for Windows. You’re free to use freeware version for both commercial and personal use.
Electronic NUmber Mapping (ENUM) Lookup Utility for Windows.
ENUM Server for Windows
SMPPCLi is a command line SMPP (Short Message Peer-to-Peer) client runs under Windows (Vista, Windows 7 / 8/10, 2008-2019 Server) which enables making GSM SMS messages.
TekPhone is a SIP (Session Initiation Protocol) VoIP Softphone that provides UA agent functions (Based on RFC 3261) runs under Windows
TekWiFi is a WiFi connection and diagnostic tool runs under Windows (Vista, Windows 7 / 8/10, 2008-2019 Server). TekWiFi simplifies connection to the wireless network which PEAP authentication implemented.
Command Line SIP (RFC 3261) User Agent for Windows
SIP Interactive Voice Response System for Windows